For the Bachmann car I'd use MT trucks, either "Bettendorf" or roller bearing.
For the MT cars, the same MT trucks will work, with the flat and 40 ft box probably having "Bettendorf" when built, while the bulkhead flat would have been built with roller bearing trucks.
BLMA trucks can be used on any of them, and will lower the MT cars to a more accurate height, but you'll have to body mount the couplers if you make the change. I don't know about the Bachmann car. If it sits too high, BLMA will work there as well. If it's already at the correct height, I'd stick with the MT.
Looks like Kiz beat me to the post by a few seconds...